Open old Mac discs on PC?

It's been 11 years since finishing my undergrad degree, and I am applying to graduate school. I need to submit some academic writing samples from my old research papers. I have all my papers saved on Mac discs from the early 90s. They are double-sided double-density discs.

I do not have a Mac anymore, only a PC (Windows XP). Is there any way I can convert these files to PC and more importantly, open these discs on a PC?

When I insert them I get the message that the discs are not formatted. They ask me to format them but I said no to keep my data intact.

Is there a software program or anything I can buy that would help me recover these files?

If you have a college close to you, talk to the computer science personal. They just may have an older mac sitting around that you could use. People also donate computers to non-profits. Check at schools,daycare centers,libraries, & churches.